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Comment Re:T-Mobile does support tethering (Score 1) 361

I using tethering on my T-Mobile Wing when I need it. It's not very fast, in the bay area I at least get Edge speeds, but things like Youtube video and large downloads usually end up timing out.

I like the tethering option because it's unlimited internet on my phone and my laptop ($20/month). If I was with any other carrier, it would be a separate $60/month plan (yikes). And for occasional use, I don't need the speed.

My guess is that G3 networks are really not ready yet for the kind of use that laptop users want.

Comment Re:Not ready for prime-time (Score 1) 95

The benchmarks I've seen on 1TB drives show about 80MB/sec average, and it goes from 60MB to 100MB/sec depending on the location of the read on the drive, SSD's don't have this non-linearity. Also, the 350MB/sec is reaching the limitations of the RAID controller, a single drive is about 150MB/sec, so it starts scaling down a little when you add more. I will probably try a PCI express adapter that has more bandwidth in the future.

Still, the main speed boost is in the latency. 0.2ms vs 8ms is a huge leap. Also, I like my system as silent as possible, so I'm willing to pay a premium for that.

I save additional files on an external 1TB drive when needed.

As far as price, if you avoid the big name brand Samsung and Intel parts, you can get fairly good prices.

Comment my SSD performance results (Score 1) 95

Okay, I just ran this benchmark on my 3 RAID0 SSD array....

From 0.5KB to 128KB write performance (in KB/sec)
3928
7368
12579
19931
48306
83492
143772
233510
252352

The reason for the low performance on small block sizes is the option called "Direct I/O" on ATTO Disk Benchmark. What this probably does is turns of your system's caching capability, so of course you are going to get ridiculously slow rates. It's good for comparison, but to say you're system is going to be slow because of it is ridiculous because in the real world your OS will cache everything. If you look around, you'll see that 7200 RPM HD also do bad on these write benchmarks. Maybe better on read, because HD have a RAM buffer, but that shouldn't matter in real world if you're using the OS's cache.

And ATTO tech is more interested in selling disk controllers anyway, so really this is more of a disk controller benchmark, not real world HD performance usage.

It would be the equivalent of turning L2 cache off on your CPU and publishing those benchmarks as real world performance.

I think a more accurate benchmark would be some type of MySQL database test.

Comment Re:Not ready for prime-time (Score 1) 95

I believe there is so much misconception out there about flash memory performance, it's astonishing. There just isn't a good understanding of how all the layers of cache in the OS work.

SSD's are not slow, do not "die young". I just built a new system with 3 SSD's in RAID0 and I'm getting 350MB/sec sequential read performance, and nearly 250MB/sec sequential write. In fact, I'm less worried adding additional drives in RAID0, because they fail by total wear, not a single point of a failure, and if the wear is being spread out, it should be less of a concern. I have not done benchmarks on random write performance yet, but I'm guessing it will not be that bad.

100% of the problems now are related to some of the controllers and how the OS caches data before writes. For example, why would you write thousands of small 1k blocks, and not cache those in memory first if the write is going to occur a second later? In fact, most OS's will intelligently do this.

So here's the real problem, a bunch of the early SSD's that came out were incredibly cheap and used really really bad controllers. Most of the new new SSD's now have moved beyond these deficiencies. Because of the past products though, it's creating a huge confusion in the market and people just don't "trust" these new products.

Robotics

First Armed Robots on Patrol in Iraq 661

An anonymous reader writes "Robots have been roaming Iraq, since shortly after the war began. Now, for the first time — the first time in any war zone — the 'bots are carrying guns. The SWORDS robots, armed with M249 machine guns, "haven't fired their weapons yet," an Army official says. "But that'll be happening soon." The machines have actually been ready for a while, but safety concerns kept them off the battlefield. Now, the robots have kill switches, so "now we can kill the unit if it goes crazy," according to the Army. I feel safer already."

Another Sony Format Bites the Dust 425

Lam1969 writes "Reuters is reporting that Universal Media Disc, Sony's PSP-only movie format, is about to kick the bucket. While the discs' novelty factor resulted in strong sales shortly after the PSP's May 2005 launch, interest rapidly dropped and movie companies are no longer interested in producing titles. From the article: "Universal Studios Home Entertainment has completely stopped producing UMD movies, according to executives who asked not to be identified by name. Said one high-ranking exec: 'It's awful. Sales are near zilch. It's another Sony bomb -- like Blu-ray."'"

Swedish Study Finds Cell Phone Cancer Risk 282

dtjohnson writes "A new Swedish study has found that heavy users of cell phones had a 240 percent increase in brain tumors on the side of their head that the phone was used on. The study defined 'heavy' use as more than 2,000 total hours, or approximately one hour of use per workday for 10 years. An earlier British study was previously discussed here that didn't find an increased risk, although that study covered fewer subjects and only followed one type of brain tumor for a shorter period of time. Or course, the biggest epidemiological study of all is the one we are all participating in whenever we use our cell phone. The results from that study won't be available for a while."
User Journal

Journal Journal: in slashdot timeout?

Funny, you make one post critisizing software pirates and slashdot bans your IP from posting messages:

Starting Score: 1 point Moderation +1 50% Insightful 20% Overrated 10% Flamebait Extra 'Insightful' Modifier 0 (Edit) Total Score: 2

User Journal

Journal Journal: grad school

I'm attempting to apply to grad school at U.C. Davis. Not sure exactly when I will be taking classes around my work schedule. Hopefully things turn out okay.

User Journal

Journal Journal: bluetooth

I guess I could sort of use this slashdot thing like a blog. I should really set up my own website again.

My next exciting project will be testing out a bluetooth headset. The Plantronics M3500. My goal is to use it both as a headset on my computer for voice conferencing, and also on my new cellphone, which I have yet to purchase. Can't wait to see how people respond when I'm just talking into this thing but they don't see a cellphone.

User Journal

Journal Journal: Looking for a job

I'm just testing out this journal feature on slashdot. It's pretty interesting. Although, I worry about this being a "permanent record"

I'm still unemployed, but I have an interview Monday. Hopefully that will turn out okay.

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